7. Looking ahead: President Obama heads to Alaska on Monday to join an international conference on climate change. He’ll have to navigate between the state’s frustration over collapsing oil prices and conservationists’ anger over his allowing oil and gas drilling in the Arctic.

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CreditCarolyn Kaster/Associated Press

8. King Salman of Saudi Arabia meets with Mr. Obama at the White House on Friday. The timing is pointed: Congress must vote on the nuclear deal with Iran, the Saudis’ regional rival, by Sept. 17.

10. Almost a third of the Republican presidential candidates — Scott Walker, Carly Fiorina, Rand Paul, John Kasich, and Ted Cruz — will be campaigning in New Hampshire. The Labor Day weekend is expected to be packed with rallies and appearances.

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CreditMark Ralston/Agence France-Presse — Getty Images

11. Travel experts forecast that more than 35 million Americans will be on the move over the coming long weekend, the most since 2008. The vast majority will be packing highways thanks to extraordinarily low gas prices. Drive safely!

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Contestants from around the globe plucked imaginary strings, competing for the title of Air Guitar World Champion 2015.Published OnAug. 29, 2015CreditImage by Joel Karppanen/European Pressphoto Agency

12. Lastly, a new air guitar world champion was crowned in Finland on Friday. The Russian performer Kereel Blumenkrant, performing as Our Daddy in a spacesuit and flashing gloves, narrowly beat the U.S. national champion, Airistotle, alias Matt Burns.